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Sulfurous acid

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Origin: China

Cas No: 7782-99-2

Specification: 99%min

Min order Quantity: 1 /kg

Supply Ability: 80 mt/month

Lead time: 7 days for OEM, 3 days for ready goods

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CAS No.: 7782-99-2 Formula: H2O3S Molecular Weight: 82.07910

Basic Info

Chemical Name	Sulfurous acid
Synonyms	Sulphurous acid; sodium sulfite; hydrogen sulphite (bisulphite); SULFUROUS ACID; dihydroxy sulphoxide; Schweflige saure [German]; acide sulfureux; Sulfur dioxide solution; acido sulfuroso; EINECS 231-973-1; UN1833;
CAS No.	7782-99-2
Molecular Formula	H2O3S
Molecular Weight	82.07910
PSA	76.74000
LogP	0.54680

Properties

Appearance & Physical State	clear, colorless liquid
Density	1.03 g/mL at 25ºC(lit.)
Refractive Index	1.788
Stability	Stable. Incompatible with strong bases.

Safety Info

RTECS	WT2775000
Hazard Class	8
Safety Statements	26-36/37/39-45
Packing Group	II
WGK Germany	1
RIDADR	UN 1833 8
Risk Statements	R20
Hazard Codes	C
Symbol	GHS05, GHS07
Caution Statement	P280; P305 + P351 + P338; P310
Hazard Declaration	H314; H332
Signal Word	Danger

Synthesis Route

2-hydroxy-2-sulfo-propionic acid→Sulfurous acid+Pyruvic acid
Sulfuric acid→Sulfurous acid
1λ4,3,5λ4,7-tetrathia-2,4,6,8-tetrazacycloocta-1,4,5,8-tetraene→Ammonia+Sulfurous acid

Toxicity

Exposure Route	Type of Test	Species Observed	Dose/Duration	Toxic Effects
Oral	TDLo - Lowest published toxic dose	Human	500 ug/kg	1.Gastrointestinal-hypermotility, diarrhea 2.Gastrointestinal-nausea or vomiting 3.Gastrointestinal-other changes